CVE-2026-27664 | Siemens CPCI85 Central Processing Communication out-of-bounds write (ssa-246443)

VDB-353636 · CVE-2026-27664 · SSA-246443 SIEMENS CPCI85 CENTRAL PROCESSING COMMUNICATION OUT-OF-BOUNDS WRITE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.9 $5k-$25k 7.75+ Summaryinfo A vulnerability labeled as critical has been found in Siemens CPCI85 Central Processing Communication and SICORE Base system. This affects an unknown function. Such manipulation leads to out-of-bounds write. This vulnerability is documented as CVE-2026-27664. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded. Detailsinfo A vulnerability was found in Siemens CPCI85 Central Processing Communication and SICORE Base system (the affected version unknown). It has been rated as critical. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes: A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V26.10), SICORE Base system (All versions < V26.10.0). The affected application contains an out-of-bounds write vulnerability while parsing specially crafted XML inputs. This could allow an unauthenticated attacker to exploit this issue by sending a malicious XML request, which may cause the service to crash, resulting in a denial-of-service condition. The advisory is shared for download at cert-portal.siemens.com. This vulnerability is handled as CVE-2026-27664 since 02/23/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 03/26/2026). Upgrading eliminates this vulnerability. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-16181). Productinfo Vendor Siemens Name CPCI85 Central Processing Communication SICORE Base system License commercial Website Vendor: https://www.siemens.com/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 8.1 VulDB Meta Temp Score: 7.9 VulDB Base Score: 8.6 VulDB Temp Score: 8.2 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.5 CNA Vector (siemens): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Out-of-bounds write CWE: CWE-787 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 02/23/2026 CVE reserved 03/26/2026 +31 days Advisory disclosed 03/26/2026 +0 days VulDB entry created 03/26/2026 +0 days VulDB entry last update Sourcesinfo Vendor: siemens.com Advisory: ssa-246443 Status: Confirmed CVE: CVE-2026-27664 (🔒) GCVE (CVE): GCVE-0-2026-27664 GCVE (VulDB): GCVE-100-353636 EUVD: 🔒 Entryinfo Created: 03/26/2026 15:32 Updated: 03/26/2026 16:35 Changes: 03/26/2026 15:32 (74), 03/26/2026 16:35 (1) Complete: 🔍 Cache ID: 99:7D4:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸